Water consistently to keep the soil evenly moist, especially during the first year after planting. Once established, Culver's Root is relatively drought-tolerant but thrives with regular watering during dry periods to encourage robust blooming and prevent wilting.

Cut back dead flower stalks in late autumn or early spring to maintain a tidy appearance and prevent self-seeding. Deadheading spent blooms can sometimes encourage a second, though usually smaller, flush of flowers.

Propagate by division in early spring or autumn. Carefully separate clumps, ensuring each section has roots and shoots. Sow fresh seeds in autumn or spring. Stem cuttings can also be taken in late spring or early summer.

Repotting is typically not necessary for established plants in the ground. For container-grown specimens, repot every 2-3 years in spring, moving to a slightly larger pot with fresh potting mix to refresh the soil and provide more space.